Baudoulin 4M11G Maintenance Manual page 15

Maintenance Manual of 4M11 Series Diesel Engine For Land Power Generators
diesel engine may not run for more than 20 minutes at the speed 105% the rated speed or the
output 110% the rated output. After the unloading, idle the diesel engine for (1~2) min before
stop.
Parameters and checking locations to be observed at all times during operations are as
below:
(1) Engine oil pressure (300～600) KPa (Idle speeds ≥120kPa);
(2) Engine oil temperature (85~105)℃;
(3) Outlet temperature of coolant (80~90)℃;
(4) Exhaust temperature after turbine ≤550℃
(5) Diesel inlet temperature : 35～41 ℃
(6) Check the exhaust fume color, to estimate the performances of the injectors and the
load of the engine. If the color of exhaust gas is black, stop and check the engine.
Note: During the diesel engine operation, check the engine for presence of water, air, and
fuel leakages. If any, stop the engine for troubleshooting.
The operator shall understand the following characteristics of diesel engine:
The power output of the engine increases along with the increasing of the speed and reaches
rated value at the rated speed.
Notice: To prevent damaging the diesel engine, it's prohibited to disconnect the cable to
the diesel engine voltage regulator or to the positive terminal of battery while the engine is
running. Differing from DC generator, it's prohibited to temporarily ground an alternator for
voltage checking.
Notice the following items while the diesel engine is running in cold regions:
(1) Fuel: Choose diesel of different trademarks depending on the environmental temperature
in winter.
(2) Lubricating oil: Choose lubricating oil of different viscosities depending on the seasons.
(3) Coolant: Add antifreeze additive into the cooling system and choose the coolant of
different trademarks and quantities depending on the ambient temperature.
(4) Start: The auxiliary starter can be adopted if necessary in winter. After the start of the
diesel engine, wait for the oil pressure and water temperature to turn normal before
running at high speed under loaded condition.
(5) Before the approach of the cold season, make sure to check the level and viscosity of
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